Malicious PDF — malware analysis report

Static analysis result for SHA-256 642fbf4539698bec…

MALICIOUS

PDF

77.4 KB Created: 2021-03-08 08:48:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f510e3c84cfe8c853ba30b1ebaf1dab9 SHA-1: 1be325b8dd56bc3156f5535d660f21785ac1cb32 SHA-256: 642fbf4539698bec3d8acbdda7b5272a12c44b1d077f9675e18e94756c6e53e3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://botokaw.ru/strik?utm_term=how+to+insert+nano+sim+card+in+lg+phone PDF link annotation
    • https://cdn.sqhk.co/tedefoso/8hddjaT/download_game_stickman_destruction_5_annihilation_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/bemememu/5TrJida/star_wars_squadrons_ps4_controller.pdfIn PDF document text
    • https://cdn.sqhk.co/sivumazudi/jeBrwBd/letafidimiriperomorubura.pdfIn PDF document text
    • https://cdn.sqhk.co/wagomito/dJgjif1/jider.pdfIn PDF document text
    • http://vakekaninu.iblogger.org/6877747225.pdfIn PDF document text
    • https://safasisi.weebly.com/uploads/1/3/4/4/134472516/c618731c6b.pdfIn PDF document text
    • https://cdn.sqhk.co/melobokodijo/fgdhcdS/jogelapuxuzej.pdfIn PDF document text
    • http://verapubudal.22web.org/tecnica_de_administracion_de_medicamentos_via_intramuscular.pdfIn PDF document text
    • https://vomimefime.weebly.com/uploads/1/3/5/3/135316042/motis-buleta.pdfIn PDF document text
    • https://tafifomoku.weebly.com/uploads/1/3/1/8/131856516/kirutajofuxisu.pdfIn PDF document text
    • http://nuzidixiwetor.22web.org/29091984804.pdfIn PDF document text
    • https://gizutiki.weebly.com/uploads/1/3/4/4/134478998/170530.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dukifubu.epizy.com/burodoje.pdfIn PDF document text
    • http://vuroxazejugu.epizy.com/78733133889.pdfIn PDF document text
    • http://pibonev.rf.gd/62720922345.pdfIn PDF document text
    • http://wozaxanakix.epizy.com/kalender_2019_indonesia.pdfIn PDF document text
    • http://getidevip.epizy.com/rulezunabalag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9f250f1-b83e-4758-802b-e4334e716b44/61379852732.pdfIn PDF document text
    • http://xapopifatudafa.rf.gd/how_to_change_time_on_citizen_eco_drive_e820.pdfIn PDF document text
    • http://fuluputig.epizy.com/81721928830.pdfIn PDF document text
    • http://gupepitasaxisal.epizy.com/why_wont_my_bluetooth_speaker_connect.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2db2f225-c68a-4675-a3d8-fb6fa3233a78/2020_spy_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/035c8fb9-478d-420d-81ff-6f91a4713960/xebobapezikotefadiwugeki.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0a1.bin
e00ac24e7e0650619a27e24e4b814600843f211b369ccfc225065baca92cc021		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A1 5540 bytes
font_01_sfnt_off0001035a.bin
0a809015dc65bd26da773e390374fdb6343e1538bc327fa643a2a0c17eb86814		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1035A 10692 bytes

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